Tellurite And Fluorotellurite Glasses For Active And Passive

6. Optical properties; MDO 214
Loss / dB.m -1
275
250
225
200
175
150
125
100
75
50
25
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
Ratio ZnO / ZnF 2
Fig. (6.42): Variation of OH band height peak absorbance at around 2900 cm -1 with
increasing ZnO / ZnF2 ratio for glasses of the series 65TeO2-(25-x)ZnF2-xZnO-10Na2O
mol. %, for 5 ≤ x ≤ 25 mol. % (MOF009 to 013).
Table (6.9): Positions (P), half-widths (W), and areas (A) of OH bands of the series
65TeO2-(25-x)ZnF2-xZnO-10Na2O mol. %, for 5 ≤ x ≤ 25 mol. % (MOF009 to 013).
Glass
Weak OH Free OH
MOF
ID
ZnO / ZnF2 ratio P /
cm -1
W /
cm -1
A /
(cm -1 ) 2
P /
cm -1
W /
cm -1
A /
(cm -1 ) 2
009 0.2 2931 377 8 3381 261 3
010 0.4 2928 356 11 3317 282 4
011 0.6 2921 363 16 3296 310 6
012 0.8 2933 376 16 3322 281 5
013 1.0 2900 402 113 3244 328 56
Fig. (6.43) and table (6.10) summarises these areas.